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Old 02-03-2023, 01:36 PM   #1
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Pacbrake, 2000 Monaco Dynasty, RR8 chassis

When Pac brake foot pedal pressed, transmission goes onto 2nd gear but flapper does not close on exhaust. If solenoid at pac brake crossed it closes.
Is there a relay or something that could be causing this. TIA
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Old 02-03-2023, 01:45 PM   #2
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This is a little confusing. Perhaps a little more explanation of exactly what is going on and when and how....Driving? What speed? Headlights on or off (yes, there is a connection)? Does it work sometime and other times not? Any more clues?
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Old 02-03-2023, 01:51 PM   #3
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In my front drivers side electrical bay below the drivers window I have two small fuse boxes. Monaco 1 & 2. In the Monaco #2 box there is a 20 amp fuse and two relays. You might check these.
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Old 02-03-2023, 02:04 PM   #4
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Contact PacBrake directly for wiring info unless someone here happens to have a copy:


BTW, the transmission does NOT downshift to 2nd gear if at highway speed. It downshifts TOWARD 2nd gear dropping to lower gears as soon as it will not over-speed the engine.


So, with the two window shift pad, the left will show 2 when the exhaust brake is activated. The right window will show what gear it is actually in.


If one window shift pad, it will show 2.


But, similar to being in drive-- it will show 6. That is the gear toward which it will shift, not the actual gear you are in at that stoplight.
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Old 02-03-2023, 06:55 PM   #5
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Can the one window shift pad be replaced with a two window style?
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Old 02-03-2023, 07:40 PM   #6
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Yes you right about the window and I use the bluefire app that show actual gear, thank you. I will call pac-break Monday.
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Old 02-03-2023, 07:49 PM   #7
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Quote:
Originally Posted by tmw188 View Post
Can the one window shift pad be replaced with a two window style?

A question for Allison.


But suspect less $$ to buy something like a Scan Gauge D that will tell you that and much more.
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Old 02-03-2023, 07:54 PM   #8
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I'll look and see thank you
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Old 02-03-2023, 08:13 PM   #9
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Is it engaging at all? If not, check the wires that the Pac Brake is getting is getting power to the solenoid. Consider a blown fuse in the right hand rear electrical bay.
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Old 02-04-2023, 01:44 AM   #10
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Following because I have the same issue (and year of rig 2000).

When going down the road the foot switch will cause the transmission to shift down, but there is no power to the brake. Replaced the foot switch- no help.

I kinda solved it… my wife wanted a toggle switch because she could not reach the foot petal comfortably. So I ordered a spdt switch and ran a new wire to the pac-brake. (One side of the double pole is the oem side - the other side is the new wire).

I would love to find out where the fuse/relay/bad connection is - but have not been able to figure it out.

There is a fuse for the pac-brake in the front fuse box (driver side). If that one was blown, then the transmission part would not work.

When you solve it - please post your solution.
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Old 02-04-2023, 09:14 PM   #11
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I too had the same problem on my 2000 Windsor. The foot pedal would work fine most of the day but then would randomly not work at all. I replaced the foot pedal with a simple switch on the left console which I prefer.
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